3 - 20 3 - 20
MELSEC-Q
3 SPECIFICATIONS
3.4.6 Setting range (buffer memory address 20 and 21: Un\G20 and Un\G21)
(1) This area is used to confirm the setting range of the D/A conversion module.
Settings for channels 1 to 4 are stored in Un\G20.
Settings for channels 5 to 8 are stored in Un\G21.
(2) For Q62DA, b8 to b15 (CH3 and 4 information) for Un\G20 and Un\G21
(information of CH5 to CH8) are invalid.
For Q64DA, Un\G21 (CH5 to CH8 information) is invalid.
b15
b12 b11
b8
b7
b4
b3
b0
CH4
CH3
CH2
CH1
to
to
to
to
CH8
CH7
CH6
CH5
Un\G20 (setting range CH1 to CH4)
Un\G21 (setting range CH5 to CH8)
Output range
Setting value
4 to 20 (mA)
0
H
0 to 20 (mA)
1
H
1 to 5 (V)
2
H
0 to 5 (V)
3
H
–10 to 10 (V)
4
H
User range setting
F
H
(3) 0
H
is default. Q68DAV is operated in 2
H
(1 to 5 V) setting even when 0
H
(default) is
set for the output range setting so that 2
H
will be stored.
3.4.7 Offset/gain setting mode and offset/gain specification
(buffer memory addresses 22 and 23: Un\G22 and Un\G23)
(1) Specifies the channel to be adjusted for the offset/gain settings.
(2) Specification can be made for 1 channel only.
An offset/gain setting mode error (error code 500) will occur if more than one
channel is specified at the same time.
(3) For Q62DA, b2 to b7 (CH3 to CH8) are invalid.
For Q64DA, b4 to b7 (CH5 to CH8) are invalid.
(4) See Section 4.6 for the details of the offset/gain settings.
b15 b14 b13 b12 b11 b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
0
CH4 CH3 CH2 CH1
Un\G22 (Offset specification)
0
0
0
0
0
0
0
0
CH4 CH3 CH2 CH1
Un\G23 (Gain specification)
0
0
0
0
0
0
0
1: Channel to be set
0: Invalid
For Q62DA, b2 to b15 information is fixed at 0.
CH8 CH7 CH6 CH5
CH8 CH7 CH6 CH5
For Q64DA, b4 to b15 information is fixed at 0.
3.4.8 Setting value specification (buffer memory address 24: Un\G24)
(1) This area is used to set the amount of adjustment for analog output values in the
offset/gain setting mode.
(2) The valid input range is from –3000 to 3000.
When the input value is 1000, the analog output values can be adjusted by about
0.33 V for voltage output and about 0.65 mA for current output.
(3) See Section 4.6 for the details of the offset/gain settings.
